接地變壓器
一、產品概述
電(dian)(dian)(dian)(dian)力系統(tong)(tong)(tong)中(zhong)(zhong)的(de)(de)(de)(de)6kV、10kV、35kV電(dian)(dian)(dian)(dian)網中(zhong)(zhong)一(yi)般(ban)都采用(yong)中(zhong)(zhong)性(xing)點(dian)不接地(di)的(de)(de)(de)(de)運(yun)行方式。電(dian)(dian)(dian)(dian)網中(zhong)(zhong)主變壓器(qi)低(di)壓側一(yi)般(ban)為三角形(xing)接法(fa)，沒有可以接地(di)的(de)(de)(de)(de)中(zhong)(zhong)性(xing)點(dian)。隨著城市(shi)電(dian)(dian)(dian)(dian)網的(de)(de)(de)(de)不斷擴大(da)(da)及(ji)電(dian)(dian)(dian)(dian)纜(lan)出(chu)線的(de)(de)(de)(de)不斷增(zeng)(zeng)多，系統(tong)(tong)(tong)對(dui)地(di)電(dian)(dian)(dian)(dian)容電(dian)(dian)(dian)(dian)流(liu)急(ji)劇增(zeng)(zeng)加，單相接地(di)后(hou)流(liu)經故(gu)障(zhang)點(dian)的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)容電(dian)(dian)(dian)(dian)流(liu)較大(da)(da)（超過10A）。為了(le)減小單相接地(di)故(gu)障(zhang)時(shi)的(de)(de)(de)(de)對(dui)地(di)電(dian)(dian)(dian)(dian)容電(dian)(dian)(dian)(dian)流(liu)，需(xu)要(yao)在變壓器(qi)中(zhong)(zhong)性(xing)點(dian)裝(zhuang)設消弧(hu)線圈等(deng)補償裝(zhuang)置，因此需(xu)人為建立一(yi)個中(zhong)(zhong)性(xing)點(dian)，以便在中(zhong)(zhong)性(xing)點(dian)接入消弧(hu)線圈，減小接地(di)短路斷路電(dian)(dian)(dian)(dian)流(liu)，提高系統(tong)(tong)(tong)供電(dian)(dian)(dian)(dian)可靠性(xing)。
另外，發(fa)電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)在運行(xing)中(zhong)，發(fa)生單相接(jie)地(di)(di)(di)是做常見的故障，故障點出現電(dian)(dian)(dian)(dian)(dian)弧(hu)(hu)接(jie)地(di)(di)(di)時會進一步擴(kuo)大定(ding)(ding)子(zi)繞(rao)組絕緣損害。發(fa)電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)中(zhong)性點經高(gao)電(dian)(dian)(dian)(dian)(dian)阻(zu)接(jie)地(di)(di)(di)能有效(xiao)抑制(zhi)發(fa)電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)接(jie)地(di)(di)(di)故障電(dian)(dian)(dian)(dian)(dian)流，從而有效(xiao)防止發(fa)電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)定(ding)(ding)子(zi)繞(rao)組燒毀(hui)，降低(di)電(dian)(dian)(dian)(dian)(dian)弧(hu)(hu)接(jie)地(di)(di)(di)暫(zan)態過電(dian)(dian)(dian)(dian)(dian)壓(ya)。為此，我公司針對電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)單相接(jie)地(di)(di)(di)故障研發(fa)了電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)中(zhong)性點接(jie)地(di)(di)(di)電(dian)(dian)(dian)(dian)(dian)阻(zu)柜，主要由(you)單相接(jie)地(di)(di)(di)變壓(ya)器與電(dian)(dian)(dian)(dian)(dian)阻(zu)器結(jie)合，可有效(xiao)避免接(jie)地(di)(di)(di)電(dian)(dian)(dian)(dian)(dian)流對發(fa)電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)定(ding)(ding)子(zi)繞(rao)組和絕緣的損害。
二、產品特點
我(wo)(wo)公(gong)司(si)生產專業(ye)6kV級、10kV級、20kV級、35kV級接地(di)變壓器，有環(huan)氧(yang)澆(jiao)注干式和油浸式接地(di)變壓器，電機專用的單相接地(di)變壓器。我(wo)(wo)公(gong)司(si)工程師在接地(di)變壓器設計方面有多年(nian)的經驗，在產品外觀、性(xing)能和品質上面處于行業(ye)領先地(di)位。
1.鐵芯
采用(yong)優(you)質冷軋取向硅(gui)鋼片,45°全(quan)斜接縫,鐵軛用(yong)穿(chuan)心螺桿夾(jia)緊,心柱用(yong)玻璃(li)纖(xian)維帶綁扎。鐵芯(xin)表面噴(pen)涂(tu)硅(gui)樹脂膠,防潮、緊固并使噪聲(sheng)降到最低。
2.繞組
內(nei)、外繞組均采用優質銅導線繞制,用分段圓筒(tong)式結構,增強(qiang)層間絕緣，采用真空干燥工藝(yi)，成型后的繞組具(ju)有電氣性(xing)能好、機械強(qiang)度(du)高、局部放電量小等特(te)點。
3.干式接地(di)變壓(ya)器用(yong)(yong)環氧樹脂不填充真(zhen)空澆(jiao)注(zhu)，相比非包封產(chan)品具有較強的防(fang)煙霧、水露能力(li)。油(you)(you)浸(jin)式接地(di)變壓(ya)器采用(yong)(yong)全(quan)密(mi)封結構，采用(yong)(yong)波紋片散熱取消儲(chu)油(you)(you)柜，油(you)(you)箱與(yu)箱沿用(yong)(yong)耐油(you)(you)膠條密(mi)封，避免變壓(ya)器油(you)(you)與(yu)空氣(qi)接觸(chu)，變壓(ya)器油(you)(you)不與(yu)空氣(qi)接觸(chu)，保證了產(chan)品絕緣性能和使用(yong)(yong)壽命(ming)。產(chan)品具有占(zhan)地(di)面積小，外形美觀(guan)，免維護特點(dian)。
4.保護裝置
油浸式(shi)接地變(bian)壓器裝有壓力釋放閥(fa)和瓦斯(si)繼電器，并配有油位計，方便隨(sui)時查看變(bian)壓器油位。干式(shi)接地變(bian)壓器配有溫(wen)控裝置，并有遠傳功能，方便隨(sui)時巡(xun)查產品運行溫(wen)度。
三、執行標準
GB 1094.1-1996 電力變壓(ya)器第(di)1部分 總則
GB 1094.2-1996 電(dian)力變壓器第2部分 溫升
GB 1094.3-2003 電力變壓器第(di)3部分 絕(jue)(jue)緣水平絕(jue)(jue)緣試(shi)驗和外絕(jue)(jue)緣空氣間隙
GB 1094.5-2003 電力變壓器(qi) 第(di)5部分(fen) 承受短(duan)路的能力
GB/T10229-1988 電抗器
四、型號說明
五、使用環境條件
1.海拔高度不超(chao)過1000米(mi)；
2.運行環境溫(wen)度-25℃至(zhi)+45℃，相對濕度不超過90%；
3.周圍無有(you)害氣體，無易燃(ran)易爆物品。
六、性能參數
額定電壓：6kV、10kV、20kV、35kV
額定頻率：50Hz
絕緣等(deng)級(ji)：A級(ji)或F級(ji)
絕緣水平：Li60AC25、Li75AC35、Li125AC55、Li200AC85